Oil burner



OIL BURNER.

APPLICATION FILED SEPT. 23, 1921.

Patented Nov.. 7, 39222 O O O iiatented Non'. "57, "1922.

OIL BURNER.

Application filed September 23, 1921. Serial No. 502,613.

T all whom it may concern.'

Be it known that l, CLYDE W. MUMMERY,

a citizen of the United States, residing at Detroit, in the county of Wayne and 'State ot' Michigan, yhave invented certain new and useful improvements in Oil Burners, of

which the following is a specification.

This invention relates to oil burners, and particularly to burners of the wickless type especially adapted and intended for burning kerosene, and in which the combustible vapor is generated, after starting, by means of heat communicated to the walls of a generating and mixing chamber which is supplied with vapor from oil in a trough below, the structure acting as a combined retort and generator and providing a smokeless flame without odor or the production of soot. The structure .is characterized by novelty with respect to the means for producing the vapor from the oil and Jfor supplying air in the proper quantity to eect perfect combustion.

@ne form of the invention is illustrated in the accompanying drawings in which Fig. 1 is a vertical section of the burner. Fig. 2 is a cross section.

Referring specifically to the drawings, 6 indicatesa supply pipe controlled by any suitable valve 7. rl`his pipe discharges into the base of the burner which has a form of a trough 8 which in the form shown is annular in shape, and above the oil line the sides of the trough are provided with air holes 9 and 1() to admit a suitable amount ot air into the trough above the oil therein.

Upon the top of this trough rests a bottom' ring 11 formed with a depending portion or trough 12 which is V-shaped in cross section and of sufficient depth to dip or extend into' the oil in the trough 8. The sides of this trough 12 have numerous small perforations 13 for admitting the mixed air and vapor to the upper part of the burner, and for starting purposes a wick 14, of asbestos or the like, may be placed in the bottom of the trough 12, where it'v will absorb oil from the oil trough below.

The body of the burner consists principally of two concentric tubular shells, an inner one 15 and an outer one '16. The former is closed at the top as indicated at 15, and the shells are spaced apart to form an annular generating, mixmg and combustion space 17 in which the oil vapor and air mixes, and in and above which'the combustion occurs. Each of the shells 15 and 16 has a large number ot pertorations 18 through which air is drawn into the s ace 17 where it mixes with the vapor rising rom 6@ what may be termed the retort below. The shell 16 is surrounded by a thin metal casing 19 having holes 2O near the bottom to admit air to the interior. rllhe shell 16 is flared at the top, as indicated at 20, and at its outer edge joins the rim of the casing19, and this flaring part or flange 22 is provided with a row of rather large pertorations 21 which will admit air from the space below and deliver the same to the flame at the top of the combustion space 17.

rlhe base trough is provided with a flange 23 to center and confine the bottom plate 11 and the casing 19, and the shells 15 and 16 rest upon auf are centered by shoulders 24 7 5 cast in the bottom plate 11. The shell 16 is also stiiened by vertical ribs 25, on the outside. The various details may be modi ed in many ways, within the scope of the invention. 36

A burner so constructed is found to have decidedladvantages. An outside starter may be used, but when the starter shown is used, sulicient oil is allowed to enter the trough 8 to saturate the wick 14 which is lighted 65 and the heat imparted to the lil-shaped channel 12 will start the generation or produc-tion ofvapor which mixes with some air entering through the openings 9 and 10 and the vapor lows through the holes 13 S9@ into the space 17 where combustion takes place, this combustion being completed by air drawn in through the holes 18 'in the shells 15 and 16, and as combustionproce'eds these shells become highly heated and a very inflammable gas results, the space 17 being filled more or less with llame which issues at the top. ln many burners of this type pressure is employed, either pressure on the air or pressure on theoil, but l have 106 found that superior results are obtained by a natural draft induced through the-'holes 18 in the shells. The holes 21 in thetop flange of the shell 16 serve a useful function by supplying heated air to the flame at the top ot the burner, and also relieving the air pressure which would otherwise rise in theA space between the shell 16 and the outer casing 19 and cause a blowing action which would be detrimental to complete coml110 vbustion. By the means shown all blowing action is avoided, and the hydro-carbon y vapor generated has time, and sufficient .oXygen, to be completely consumed with a blue flame and without yellow points often seen. in vapor burners, which denote incomplete combustion and result inthe production of soot. It will be appreciated that as combustion proceeds the air within the central tube as well as between the tubular mix with the air admitted through the air.y

members 16 and 19 becomes highly heated,

which is advantageous for combustion pur-v holes in the shells.

I claim:

l. A burner having a pair of inner and outer spaced circular upright shells provided with air holes through the same and means to supply .oil vapor to the bottom of said space, the outer shell having an outwardly and upwardly ared partait the top provided with air holes.

2. A. burner comprising an oil trough having air holes in the side thereof, a bottom burner plate having a V-shaped channel depending in said trough, the sides of said channel being perforated, and inner and outer shells-standing upon said bottom plate at opposite edges of said channel, said shells having air holes and the space between said shells being open at the top.

3. A burner comprising an oil trough havv ing air holes inthe side thereof, a bottom burner plate having a V-shaped channel dependingin said trough, the sides of said channel being perforated, and inner and outer shells standing upon said bottom plate at opposite edges of said channel, said shells .having air holes and the space between said -shells being open at the top, and an outer casing enclosing and spaced from the outer shell, said `(casing having air inlets atthe` bottom and the space between the outerv shell and the casing having air outlets at the top.

In testimony whereof, I afix my signature in presenoe of a witness. A

l CLYDE W. MUMMERY. Witness:

GEO. E. Tnvv.` 

